Karl to White House: After Repeated Congressional Failures Under Obama, Who Is The Leader of The Democratic Party?

Noting that nearly a third of the Democratic House caucus voted against reauthorization of the National Defense Authorization Act (NDAA) and that a substantial amount of Democrats in the House and in the Senate oppose President Obama on the Trans-Pacific Partnership (TPP) trade deal, ABC's Jonathan Karl asked deputy White House press secretary Eric Schultz who is the leader of the Democratic Party?
"Who right now is the leader of the Democratic party?" Karl asked after laying out his argument. "It doesn't seem like the president is really showing persuasive power with Democrats on Capitol Hill right now."
"Jon, I'm not sure that's true," Schultz replied.
"The president is the leader of the Democratic party," Schultz also proclaimed.
JONATHAN KARL, ABC NEWS: A question on the National Defense Authorization Act (NDAA). You laid out a forceful case that the White House has previously laid out why the president would veto that bill that passed the House. Fourty-one Democrats voted for that bill, a third of the Democratic caucus. The president's also made the case very forcefully for the trade promotion authority bill, the TPP, and your hard-pressed to find more than a dozen Democrats in the House that are willing to agree with the president and vote in favor of that.
So my question is simple: who right now is the leader of the Democratic party? It doesn't seem like the president is really showing persuasive power with Democrats on Capitol Hill right now.
ERIC SCHULTZ, WHITE HOUSE DEPUTY PRESS